Wheel cap for a vehicle wheel

ABSTRACT

The invention relates to a cover plate for a vehicle wheel having a holding device which is activated by a lateral pressing-on of the appropriately position cover plate and thereby fixes the cover plate on the wheel body, in which case the holding device is deactivated by another pressing-on of the cover plate in the same direction, sot hat the cover plate can then easily be removed from the wheel body. Elements of the holding device are preferably a connecting link path as well as a detent pin guided therein during the mounting of the cover plate. By means of its free end, during the placing of the cover plate on the wheel body, this detent pin is guided such in the connecting link path that, by means of a first pressing-on of the cover plate, it arrives in a detent position in the connecting link path, and, by means of another pressing-on of the cover plate, it is changed out of this detent position, into a connecting link path section by way of which the detent pin can be guided out of the connecting link path. In this case, the cover plate can preferably be pressed onto the wheel body against a spring force. While the detent pin is fastened on the cover plate, this fastening and/or the detent pin itself being at least slightly flexible, the connecting link path is provided in a wheel hub insert which can be inserted in the wheel body.

[0001] The invention relates to a cover plate for a vehicle wheel, having a holding device which is activated by a lateral pressing-on of the appropriately positioned cover plate and thereby fixes the cover plate on the wheel body. With respect to the technical context, reference is made, for example, to European Patent Document EP-0 310 777 A1 and German Patent Document DE-OS 27 45 072.

[0002] In principle, a plurality of constructions are known for wheel cover plates of vehicles, particularly passenger cars. In this case, these cover plates are to be relatively easily fastenable on the wheels and are to be removable just as easily from the wheels when a wheel change is to take place. However, during a conventional driving operation, the cover plate is to be held securely and in a captive manner on the vehicle wheel. The most common type of fastening in this case is a snap-type connection with usually several holding tongues having holding noses which reach behind a detent shoulder or the like. Normally, the holding tongues are situated on the wheel cover while the detent shoulder or the like is provided on the vehicle wheel or the so-called wheel body.

[0003] While these known cover plates can be fitted relatively easily on the wheel body, specifically by a more or less strong lateral pressing-on, a demounting of the cover plates is virtually possible only by means of a suitable tool, in which case cover plates are also often levered off the wheel body by means of a screwdriver, whereby the wheel body as well as the cover plate may be damaged.

[0004] A cover plate is to be indicated hereby which has a holding device distinguished by its easy mountability and demountability. In particular, the cover plate should be demountable without a tool (=object of the present invention).

[0005] This object is achieved in that the holding device is deactivated by another pressing-on in the same direction (with respect to the mounting direction) of the cover plate, so that the cover plate can easily be removed from the wheel body. Advantageous developments and further developments are the content of subclaims.

[0006] According to the invention, the same activity or movement which is carried out for mounting the cover plate and which—as known and explained—can be carried out without a tool can also be implemented for the demounting in that the cover plate is again pressed against the wheel body. This will then be similar to operating a ball point pen, where, as a result of a pressing of the operating button in the same direction, the refill can be moved out of the pen and can be moved back into it. It is obvious that, by utilizing this technically basically known principle, a cover plate of a vehicle wheel can not only by mounted in a simple manner but can also be demounted just as easily.

[0007] In a preferred embodiment, the holding device consists of a connecting link path as well as of a detent pin guided therein (during the mounting of the cover plate), one of these elements being assigned to the wheel body and the other being assigned to the cover plate. When now the detent pin is guided by means of its free end when placing the cover plate on the wheel body such in the connecting link path that, when the cover plate is pressed on a first time, its reaches a detent position in the connecting link path, the cover plate is first held firmly on the wheel body. When, during another pressing-on of the cover plate, the free end of the detent pin is changed from this detent position into a connecting link path section, by way of which the detent pin is moved out of the connecting link path, the cover plate can then simply be lifted off the wheel body. This pressing-on of the cover plate may take place with or without the aid of additional auxiliary devices.

[0008] If, in this case, the already mounted cover plate can be pressed against the wheel body only after overcoming a spring force, it is ensured that, without the effect of such a force, the detent pin remains in the detent position with its free end, so that, in the normal driving operation of the vehicle, the cover plate cannot detach itself independently and then be lost. Furthermore, the force to be overcome may have the effect that, when the cover plate is pressed on again, the detent pin with its free end will really move from the detent position of the connecting link path into the desired connecting link section finally leading out of the connecting link path. Finally, the last-mentioned movement is also promoted by the spring force which had to be overcome previously.

[0009] In this context, it should be pointed out that, for providing this spring force, an independent spring element may be provided which can be arranged at the appropriate location between the cover plate and the wheel body and may be constructed, for example, as a coil pressure spring. In the sense of an advantageous combination of functions, however, the cover plate itself may be constructed to be elastic—for example, in the form of a membrane—, and thereby act as a quasi cup spring. In this case, the cover plate can be supported at least in sections of its circumference on the wheel body while, for example, in the center of the cover plate or at other circumferential sections, the holding device is provided, which requires that in the last-mentioned area (or possibly in several areas), a desired relative movement is possible between the cover plate and the wheel body.

[0010] If the detent pin is fastened to the cover plate, the above-mentioned connecting link path is therefore assigned to the vehicle wheel or wheel body. In order to be able to use essentially conventional wheel bodies, it is suggested to provide the connecting link path in a separate component, specifically in a special so-called wheel hub insert, which can be inserted into the wheel body. In this case, it is constructively simpler to place a connecting link path in such a component than to mount the so-called detent pin there. The latter can be mounted in a simpler manner and particularly also protected, for example, by means of a so-called ring segment extension, on the interior side of the cover plate facing the wheel body. In addition, it is advantageous for this fastening of the detent pin on the cover plate and/or the detent pin itself to be at least slightly flexible, because then the detent pin with its free end can optimally follow the connecting link path which—with a view to the desired function—necessarily extends in a curved manner.

[0011] Naturally, it is required to fasten the above-mentioned additional separate component, specifically the wheel hub insert, in an appropriate manner on the vehicle wheel or on its so-called wheel body. This can take place in a particularly simple manner when this wheel hub insert is held in the wheel body by means of at least slightly flexibly constructed holding noses. In this case, advantageously, a simple exchange of the wheel hub insert will then be possible, if this should be required. For securing this suggested connection technique between the wheel hub insert and the cover plate, the latter may have a so-called ring segment extension on its side facing the wheel body. In the assembled condition, this ring segment extension prevents a movement of the holding noses releasing the wheel hub insert with respect to the wheel body. In this case, such a ring segment extension can also assume a second function, specifically that of guiding or centering the cover plate during the assembly with respect to the wheel body or the wheel hub insert.

[0012] In this context, it should be mentioned that basically a single holding device according to the invention (consisting of a detent pin and a connecting link path) may be sufficient. With a view to a more secure fastening as well as a secure mounting (also under aspects of symmetry), two, preferably mutually diametrically opposite detent pins may be provided together with connecting link paths which are assigned to them.

[0013] When the most unfavorable circumstances coincide, a cover plate according to the invention can relatively easily be removed by an unauthorized person or even by a lateral stone throw from the wheel body if, as indicated above, for this purpose, the cover plate must only be pressed against the wheel body and in the process has to be displaced by a certain distance with respect to the wheel body. In order to prevent this, according to an advantageous further development, the cover plate can be provided with a securing element which can be overcome only in the case of a precise contact pressure and which, when the cover plate is not precisely pressed on, will prevent that this cover plate is displaced to such an extent that it can easily be removed from the wheel body.

[0014] A so-called “blockading device” or the like may therefore be provided which prevents an unauthorized or unintended removal of the cover plate. On the one hand, this “blockading device” in the form of a suitable securing device according to the invention should be bridgeable relatively easily and particularly without a special tool. These requirements can be met relatively easily in that the pressing-on of the cover plate has to take place in a very special manner in order to be successful, that is, in order to be able to easily remove the cover plate after the pressing-on with a slight displacement from the wheel body. The latter requires that a holding device between the cover plate and the wheel body was released by this displacement of the cover plate, which should take place only if, during the pressing onto the wheel body, the cover plate was displaced by a certain minimal distance with respect to the wheel body. When the securing element according to the invention now prevents that, in the event of a faulty, that is, not precise pressing-on of the cover plate, the latter was displaced by the mentioned minimum distance with respect to the wheel body, the cover plate can then—as desired—also not be removed from the wheel body because the above-mentioned holding device could not be released.

[0015] The suggested securing element may operated on the basis of various operating principles. Preferably, two components, of which one is fastened to the cover plate and the other is finally fastened to the wheel body, can then always hook into one another when the cover plate is not pressed in a precise manner against the wheel body. In this case, this mutual hooking into one another, which is to be understood in the broadest sense, can take place in a form-locking and/or frictionally engaged manner. Frictional engagement can be utilized in a simple fashion when the securing element is constructed as a pair of fitting elements, in which case a first fitting element which, for visual as well as functional reasons, is provided on the side of the cover plate facing the wheel body and is aligned essentially perpendicularly with respect to that side, can be introduced with a tight fit into a second fitting element finally fastened in or on the wheel body.

[0016] As far as the above-mentioned precise pressing-on of the cover plate is concerned, which permits a displacement of the cover plate to such an extent that then the holding device between the cover plate and the wheel body is deactivated, this can occur particularly when the cover plate is pressed on precisely perpendicularly to the wheel plane or the cover plate plane; that is, exactly in the direction of wheel axis. This can be achieved either in that the preferably circular cover plate mounted, as customary, centrically with respect to the wheel is acted upon exactly in its (circular) center by a corresponding contact pressure, or in that this contact pressure, for pressing the cover plate onto the wheel body, is applied at two mutually exactly diametrically opposite points in the edge area of the cover plate. In this context, it is particularly reliable if, when pairs of fitting elements are used as securing elements, two pairs of fitting elements are provided which, viewed over the circumference of the circular cover plate, are offset by 180° with respect to one another. In this case, these pairs of fitting elements may be designed such that only if the contact pressure for pressing the cover plate against the wheel body is applied in their area, these fitting elements permit the displacement or displacing movement of the cover plate required for deactivating the holding device.

[0017] A preferred simple and nevertheless reliable design of the fitting elements mutually interacting as a securing element according to the invention is obtained when one of the fitting elements is constructed in the form of a pin with a rectangular cross-section and the other fitting element is constructed as a structure guiding this pin at least between two mutually opposite sides. Pictorially, this pair of fitting elements can be constructed for this purpose, for example, in the manner of a match box, in which case the interior box part receiving the matches with a rectangular cross-section is connected as a “pin” to the cover plate and is inserted, when the cover plate is pressed against the wheel body, into the exterior box shell part, which guides this “pin” as the above-mentioned “structure” and is finally fastened to the wheel body. In this case, it should explicitly be pointed out that this structure, which is finally fastened to the wheel body, or generally the (second) fitting element, which is finally fastened to the wheel body, of the securing element according to the invention definitely does not have to be fastened directly to the wheel body. On the contrary, this second fitting element (or the above-mentioned structure guiding the pin) may also be provided on an intermediate element between the cover plate and the wheel body, which intermediate element, for example, directly carries the cover plate and the pertaining holding device, and which, in turn, is appropriately fastened to the wheel body, as indicated above in the form of the so-called wheel hub insert illustrated there.

[0018] In order not to let the demand on the manufacturing tolerances at the above-mentioned pair of fitting elements grow to extreme proportions, this pair of fitting elements may be designed such that, after a partial displacement of the cover plate, a more narrow fit will be present. This ensures that in fact only when the cover plate is pressed completely precisely into the direction of the wheel axis against the wheel body, a free moving position is ensured between these fitting elements. Even when a low diagonal force is introduced, these fitting elements will then hook into one another at this narrowed fit and thereby prevent a further displacement of the cover plate in a direction releasing the holding device between the cover plate and the wheel body.

[0019] In the following, the invention will be explained by means of a preferred embodiment. In this case, the attached FIG. 1 is a partial longitudinal sectional view of a vehicle wheel in which an above-mentioned wheel hub insert is already situated and onto which or in which the cover plate illustrated next to it is to be mounted. FIG. 2 illustrates the conditions in which the cover plate is mounted corresponding to the representation of FIG. 1. FIG. 3, in which only the wheel hub insert with the collecting link path is shown as a sectional view and the detent pin guided in the connecting link path is shown, illustrates the conditions during a demounting of the cover plate. FIG. 4 is a perspective view of the so-called wheel hub insert, and FIG. 5, which is a partial longitudinal sectional view is rotated with respect to FIG. 1 about the wheel axis of the wheel body as well as a view of the wheel hub insert, shows the fastening of the latter to the wheel body. FIG. 6 is a detailed sectional view A-A of FIG. 1.

[0020] Supplementing the above-mentioned figures, FIG. 7 shows so-called securing devices or a “blockading device”. This is only a three-dimensional view of the cover plate from the rear or the inside. The additional FIGS. 8a to 8 c are each a sectional view of a pair of fitting elements which form a securing element used as a “blockading device”, in three different positions of the cover plate with respect to the wheel body or an intermediate element mounted thereon which carries the second fitting element of the pair of fitting elements. Basically all characteristics described in detail may be essential to the invention.

[0021] First, with reference to FIGS. 1, 2, reference number 1 indicates the axis of rotation of an only partially shown wheel body 2 of a vehicle wheel, particularly of a wheel of a passenger car. In a simple manner, a wheel cover plate 3 is to be mounted laterally on this wheel body 2, which wheel cover plate 3 can be demounted just as easily (particularly without the aid of a tool) from the wheel body 2. For this purpose, two holding devices are provided in a mutually diametrically opposite manner, which each consist of a detent pin 4 as well as of a connecting link path 5.

[0022] On the so-called interior side of the cover plate 3 facing the wheel body 2, two ring segment extensions 8 are provided concentrically to the axis of rotation 1 and in this case in a mutually diametrically opposite manner, the diameter of a circular ring formed by these corresponding ring segment extensions 6 being adapted approximately to a wheel hub breakthrough 7 in the wheel body 2. Between these two ring segment extensions 6, mutually essentially diametrically opposite, two so-called detent pins 4 are fastened to the interior side of the cover plate 3 which extend approximately in the direction of the axis of rotation 1. These detent pins or there fastening are relatively flexible; that is, each detent pin 4 is linked quasi elastically to the cover plate 3. The free ends 4 a of the detent pin 4 are provided with two aligned holding pins 4 b arranged perpendicular to the axis 1 of rotation and pointing to the outside, as illustrated in FIG. 6.

[0023] An additional component of each holding device is a connecting link path 5. Two of these connecting link paths 5 are provided—analogous to the detent pins 4, in a mutually essentially diametrically opposite manner—on or in the interior surface of an essentially ring-shaped wheel hub insert 8 which is circular-cylindrical on the exterior side. The shape of the wheel hub insert 8 is best shown in FIG. 4. The connecting link paths 5 are shaped out of a thicker wall section 8 a of the wheel hub insert 8 and have a so-called guiding-in section 5 a, a so-called detent position 5 b, as well as a guiding-out section 5 c (also compare FIG. 3). The guiding-in section 5 a, beginning in a start position S (in FIG. 1 at the level of the axis of rotation 1), and the guiding-out section 5 c are sloped in a ramp-shaped manner with respect to the axis of rotation 1, in the representation according to FIG. 1, section 5 a being situated above and section 5 c being situated below the axis of rotation 1. The so-called detent position 5 b is situation in-between, which in this figure is situated slightly above the axis 1 of rotation. This detent position virtually represents a reversal point in the connecting link path 5. In this case, the connecting link path 5 or its sections 5 a, 5 b, 5 c, which are cohesive in this sequence, are bounded on the exterior side completely or partially by the thicker wall section 8 a and, on the interior side, by a so-called guide piece 8 b which, however, actually is also a component of the thicker wall section 8 a.

[0024] As best described in FIG. 1, the wheel hub insert 8 is inserted into the above-mentioned wheel hub breakthrough 7, which has a circular cross-section. Now, the cover plate 3 should be fitted in the direction of the arrow 9 from the side onto the wheel body 2 in such a manner that each detent pin 4 is introduced by means of its holding pin 4 b situated at the free end 4 a into the assigned connecting link path 5 or into its guide-in section 5 a. In this case, the cover plate 3 is centered or appropriately guided by the two above-mentioned ring segment extensions 6 and their so-called flattenings 6 a (compare FIG. 6) which slide with their exterior surfaces along the assigned interior surface of the wheel hub insert 8. By means of this slide-in movement according to the direction of the arrow 9, the cover plate 3 finally arrives in the position illustrated in FIG. 2, which reflects the mounted condition. In this case, each holding pin 4 b of each detent pin 4 in the assigned connecting link path 5 is in the above-mentioned detent position 5 b. This position can be taken up only after the cover plate 3, which previously came to rest on the wheel body 2 with its outer circumference 3 a, in the area of the detent pins 4 is pressed farther corresponding to the direction of the arrow 9. Here, the cover plate itself 3 therefore acts as a diaphragm spring or cup spring which, in the mounted condition according to FIG. 2, that is, when the holding pin 4 b at the free end 4 a of each (then braced) detent pin 4 is in the detent position 5 b, is virtually prestressed.

[0025] The conditions during a demounting of the cover plate 3 are best illustrated in FIG. 3. For this purpose, the cover plate 3, which is not shown or shown only by means of one of its detent pins 4 in this figure, is again pressed in the direction of the arrow 9 against the wheel body 2 or against the wheel hub insert 8 situated therein, specifically essentially in the area of the two detent pints 4. By means of the resulting displacement movement of the detent pins 4 according to the direction of the arrow 9 (this displacement movement is permitted by the above-explained elastic characteristic of the quasi prestressed cover plate 3), each free end 4 a of the detent pin 4 prestressed as a result of its deflection from the so-called zero position is changed from the so-called zero position (corresponding to FIG. 1) from the detent position 5 b of the connecting link path 5, into the guide-out section 5 c of the connecting link path 5, after which, first, because of the described spring effect and, second, also manually, the cover plate 3 can be removed against the direction of the arrow 9 from the wheel body 2, that is, from the wheel hub insert 8. In this case, the holding pin 4 b at the free end 4 a of the detent pin 4 moves in the guide-out section 5 c of the connecting link path 5 according to arrow 10.

[0026]FIG. 5 illustrates best how the wheel hub insert 8 is held in the wheel body 2 or in its wheel hub breakthrough 7. Holding noses 11 are shaped out of the wall of the wheel hub insert 8 at a total of four points and situated diametrically opposite one another in pairs (compare also FIGS. 1 and 4), which holding noses 11 project elastically beyond the exterior surface of the wheel hub insert 8 which is circularly cylindrical on the exterior side. As illustrated in FIG. 5, these elastic holding noses 11, in the mounted condition, reach behind a corresponding ring-shaped projection 12 of the wheel body 2 in the wheel hub breakthrough 7. Interacting with a marginal web 8 c of the wheel hub insert 8, the latter can therefore (at least in the direction of the axis 1 of rotation) not move with respect to the wheel body 2 as long as the elastic holding noses 11 cannot be deflected in the radial direction to the inside toward the axis of rotation 1. As illustrated, this is prevented by the two ring segment extensions 6 of the cover plate 3 which, when the cover plate 3 is mounted, are situated in the area of the holding noses 11 inside the latter. If, in contrast, the cover plate 3 is not mounted, the wheel hub insert 8 can also be demounted against the direction of the arrow 9 because, when a corresponding tension force is applied, the holding noses 11 move slightly radially toward the inside. Inversely, a mounting of the wheel hub insert 8 is naturally also possible. In addition, if desired or required, a certain orientation can be defined or provided in the circumferential direction between the cover plate 3 and the wheel hub insert 8.

[0027] By means of the illustrated holding device described in detail (essentially consisting of the two detent pins 4 and the assigned connecting link paths 5), the cover plate 3 according to the invention can not only be easily mounted but, in particular, can also just as easily be demounted. For the two above-mentioned operations, only a contact pressure force in the direction of the arrow 9 must be applied to the cover plate 3, for example, in the area of the detent pins 4.

[0028] By means of the additional FIGS. 7, 8a to 8 c, an advantageous further development will now be described, specifically a so-called blockading device, here in the form of two securing elements, which are formed by so-called fitting elements and which ensure that the cover plate can be displaced only by a precise pressing-on such that subsequently this cover plate can easily be removed from the wheel body. First, with reference to FIG. 7, analogous to the preceding figures, the reference number 1 indicates the axis of rotation of a vehicle wheel which is not shown. A cover plate 3 can in this case be placed on its so-called wheel body. Essentially only the rearward side or interior side, that is, the side facing the wheel body, which is not shown, of the cover plate 3 is visible here. The axis 1 of rotation extends through the center of the cover plate 3 and stands perpendicularly on a plane described by the cover plate 3.

[0029] As explained above, from this interior side of the cover plate 1 (3? translator), two detent pins 4 extend essentially parallel to the axis 1 of rotation toward the interior, that is, toward the wheel body. At the free end of each detent pin 4, a holding pin 4 b is provided perpendicularly to the detent pin 4. This holding pin 4 b of the detent pin 4 interacts with a connecting link path which is provided in a so-called wheel hub insert not illustrated in FIG. 7, which wheel hub insert is fastened to the wheel body and, together with the latter, forms a holding device for the cover plate 3 on the wheel body. The above-mentioned connecting link path is designed such that the holding device is activated by the pressing of the cover plate 3 onto the wheel body, so that the cover plate is fixed on the wheel body, and in that, by another pressing-on of the cover plate in the same direction, while it is simultaneously displaced toward the wheel body, this holding device is deactivated, so that then the cover plate 3 can easily be removed from the wheel body.

[0030] As illustrated in FIG. 7, in addition to the two detent pins 4, two so-called first fitting elements 13 now project from the interior side of the cover plate 3 also parallel to the axis 1 of rotation, which fitting elements 13 are arranged, away from the cover plate center, in a mutually diametrically opposite manner, that is, viewed along the circumference of the circular cover plate, mutually offset by 180°. Each of these fitting elements 13 forms a groove-shaped structure with a rectangular cross-section, this “groove” extending precisely parallel to the axis 1 of rotation. A second fitting element 14, which is constructed virtually as a pin with a corresponding rectangular cross-section, projects into this groove of each fitting element 13. This second fitting element 14 is illustrated only in FIGS. 8a to 8 c, which show the section X-X of FIG. 7 through the fitting element 13 (there, without a second fitting element 14).

[0031] The second fitting element 14 illustrated only in FIGS. 8a to 8 c in the form of a pin being essentially a section thereof, which pin has an (essentially) rectangular cross-section, is finally fastened or provided on the wheel carrier and here on the wheel hub insert mentioned in the second-to-the last paragraph. This pin-type second fitting element 14 is surrounded at a sufficient distance by a so-called edge structure 16 which, however, is not required for the actual function of the two fitting elements 13, 14 mutually interacting as a so-called securing element 15.

[0032]FIGS. 8a to 8 c successively show how the mutual relative position of the two fitting elements 13, 14 changes when the cover plate 3 and thereby the first fitting element 13 fastened thereto, for deactivating the above-mentioned holding device, is pressed against the wheel body and is therefore displaced toward this wheel body. By means of this displacing movement or displacement of the fitting element 13, the second fitting element 14 constructed as a pin is introduced into the “groove” of the first fitting element 13. In this case, the “groove” or the structure forming the first fitting element 13 guides the “pin” in the form of the second fitting element 14, as illustrated, between two mutually opposite sides.

[0033] In this case, the fit between the two fitting elements 13, 14 is dimensioned to be so narrow that the displacement illustrated in FIGS. 8a to 8 c will be possible only when the cover plate 3 is pressed precisely in the direction of the axis 3 (1? translator) of rotation. When now—as illustrated—, two such pairs of fitting elements 13, 14 are provided along the circumference of the cover plate 3 mutually offset by 180°, this above-mentioned prerequisite of the exact pressing-on of the cover plate 3 against the wheel body can virtually be met only if the corresponding contact pressure is applied to the exterior side (not visible in FIG. 7) of the cover plate 3 exactly in those areas behind which the fitting elements 13 project from the interior side of the cover plate 13, in which case additionally the entire contact pressure is to be uniformly distributed to these two points. If, in contrast, this requirement has not been met, that is, the cover plate 13 is pressed non-uniformly from the outside or above the incorrect points against the wheel body, as a result of the then “oblique” loading, the two fitting elements 13, 14 of a pair of fitting elements will then hook into one another, that is, rub against one another to such an extent that a self-locking occurs, and the cover plate 13 cannot be displaced farther toward the wheel body or the fitting element 14 cannot be introduced farther into the fitting element 13. Summarizing, the fitting elements 13, 14 (or the corresponding pair of fitting elements) therefore form a securing element 15 which, when the cover plate 3 is not pressed exactly against the wheel body, will prevent that this cover plate 3 is displaced to such an extent that it can easily be removed from the wheel body.

[0034] As shown in FIGS. 8a to 8 c, the fitting element 14 is designed such that, after a partial displacement of the cover plate 3, a narrower fit will be present. The cross-section of the rectangular “pin” is slightly larger in its “lower” “U” area than in the “O” area of its free end. While, in the “upper” “O” area, the first fitting element 13 always rests against the second fitting element 14 when the cover plate 3 is mounted on the wheel body, in the “lower” “U” area, the first fitting element 13 will come in contact with the second fitting element 14 only when the cover plate 3 and thus the first fitting element 13 has already been displaced, that is, pressed on, by a certain distance with respect to the wheel body. The increased displacing or pressing-on of the wheel plate 3 and thus of the fitting element 13 required for a releasing of the above-mentioned holding device between the cover plate and the wheel body will be possible only if the cover plate 3, as described above, is pressed completely precisely in the direction of the wheel axis 1 against the wheel body because only then will a free movement be ensured between the fitting elements 13, 14.

[0035] The securing element 15 formed between the fitting elements 13, 14 or here the two securing elements 15 ensure that, only in the case of an exact pressing-on of the cover plate 3, a releasing of the above-mentioned holding device will be possible, while, even in the case of a slightly oblique introduction of force, the fitting elements 13, 14 hook into one another and thus prevent a further displacement of the cover plate 3 in a direction releasing the holding device between the cover plate and the wheel body. In this case, the introduced securing device 15 is distinguished by a simple, weight-saving cost-effective construction while simultaneously reliably carrying out its function. In this case, it should also be pointed out that a plurality of details, particularly of the constructive type, may definitely also have a design which deviates from the illustrated embodiment, without leaving the content of the claims.

LIST OF REFERENCE NUMBERS

[0036]1 Axis of rotation

[0037]2 wheel body

[0038]3 cover plate

[0039]3 a outer circumference (of 3)

[0040]4 detent pin

[0041]4 a free end (of 4)

[0042]4 b holding pin (on 4 a)

[0043]5 connecting link path

[0044]5 a guiding-in section

[0045]5 b detent position

[0046]5 c guiding-out section

[0047]6 ring segment extension

[0048]6 a flattening (of 6)

[0049]7 wheel hub breakthrough (in 2)

[0050]8 wheel hub insert

[0051]8 a thicker wall section (of 8)

[0052]8 b guide piece

[0053]8 c marginal web

[0054]9 direction of the arrow

[0055]10 direction of the arrow

[0056]11 holding noses

[0057]12 projection (on 2 in 7)

[0058]13 fitting element

[0059]14 fitting element

[0060]15 securing element

[0061]16 marginal structure

[0062] O upper area of the pin-shaped fitting element 14

[0063] U lower area of the pin-shaped fitting element 14

[0064] S start position on 5 a, corresponds to the so-called zero position of 4 a (FIG. 1) 

1. Cover plate for a vehicle wheel, having a holding device which is activated by a lateral pressing-on of the appropriately positioned cover plate and thereby fixes the cover plate on the wheel body, characterized in that the holding device is deactivated by another pressing of the cover plate (3) in the same direction, so that the cover plate can easily be removed from the wheel body (2).
 2. Cover plate having a holding device ac cording to claim 1, characterized in that elements of the holding device are a connecting link path (5) as well as a detent pin (4) guided therein during the mounting of the cover plate (3), one of these elements being assigned to the wheel body (2) and the other being assigned to the cover plate (3), and in that the detent pin (4) is guided by means of its free end (4 a), when the cover plate is placed on the wheel body, such in the connecting link path (5) that, by means of a first pressing-on of the cover plate, it arrives in a detent position (5 b) in the connecting link path (5), and in that, by means of another pressing-on of the cover plate (3), the free end (4 a) of the detent pin (4) is changed out of this detent position (5 b) into a connecting link path (5 c) by way of which the detent pin (4) can be moved out of the connecting link path (5).
 3. Cover plate having a holding device according to claim 1 or 2, characterized in that the cover plate (3) can be pressed against spring force onto the wheel body (2).
 4. Cover plate having a holding device according to one of the preceding claims, characterized in that the detent pin (4) is fastened to the cover plate (3), this fastening and/or the detent pin itself being at least slightly flexible.
 5. Cover plate having a holding device according to one of the preceding claims, characterized in that the connecting link path (5) is provided in a wheel hub insert (8) which can be inserted into the wheel body (2).
 6. Cover plate having a holding device according to claim 5, characterized in that the wheel hub insert (8) is held by way of at least slightly elastically constructed holding noses (11) in the wheel body (2), the mounted cover plate (3) preventing by means of at least one ring segment extension (6), a movement of the holding noses (11) releasing the wheel hub insert (8) with respect to the wheel body (2).
 7. Cover plate having a holding device according to one of the preceding claims, characterized in that two mutually essentially diametrically opposite detent pins (4) are provided which have connecting link paths (5) assigned to them.
 8. Cover plate according to one of the preceding claims, characterized in that the cover plate (3) is provided with a securing element (15) which can be overcome only by means of a precise pressing-on and which, when the pressing-on of the cover plate is not exact, prevents that this cover plate is displaced to such an extent that it can easily be removed from the wheel body.
 9. Cover plate according to claim 8, characterized in that the securing element (15) is constructed as a pair of fitting elements (13, 14), a first fitting element (13) provided on the side of the cover plate (3) facing the wheel body and aligned essentially perpendicularly thereto being insertable with a tight fit into or onto a second fitting element (14) finally fastened to the wheel body.
 10. Cover plate according to claim 9, characterized in that one of the fitting elements (14) is constructed in the shape of a pin with a rectangular cross-section, and the other fitting element (13) is constructed as a structure guiding this pin at least between two mutually opposite sides.
 11. Cover plate according to one of the preceding claims, characterized in that, viewed along the circumference of the essentially circular cover plate (3), two pairs of fitting elements (13, 14) are provided offset by 180° with respect to one another.
 12. Cover plate according to one of the preceding claims, characterized in that at least one of the fitting elements (14) of a pair of fitting elements is designed such that a more narrow fit is present after the partial displacement of the cover plate (3). 